1. Department of Pharmacy School of Health Sciences, University of Zambia Lusaka Zambia
2. Department of Pharmacy School of Health Sciences, Levy Mwanawasa Medical University Lusaka Zambia
3. Department of Pharmacy Mary Begg Health Services Ndola Zambia
4. HIV and Women's Health Research Group University Teaching Hospital Lusaka Zambia
5. Department of Epidemiology and Biostatistics School of Public Health, University of the Witwatersrand Johannesburg South Africa